package br.ufpe.cin.mac.demo.ImageProcesser.server;
/**
 * @(#)ImageFilenameFilterImpl.java	15.2 03/05/20
 *
 * Copyright (c) 2003 Sun Microsystems, Inc.
 * All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduct the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS
 * SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
 * USING, MODIFYING OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO
 * EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT
 * OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
 * PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF
 * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN
 * IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that Software is not designed,licensed or intended for
 * use in the design, construction, operation or maintenance of any nuclear
 * facility.
 */



import java.io.File;
import java.io.FilenameFilter;

/**
 * An implementation of the <code>FilenameFilter</code> interface specific
 * to image file formats supported by JAI 1.1. This class allows a given
 * file name to be classified as an image file name if the file name 
 * extension (the last three or four letters after the ".") are any one
 * of the following: bmp, gif, fpx, jpeg, jpg, png, pnm, pgm, ppm, tiff
 * or tif.
 */


public class ImageFilenameFilterImpl implements FilenameFilter {

    /**
     * Default constructor.
     */


    public ImageFilenameFilterImpl() {
    }
    
    /**
     * Tests if a specified file should be included in a file list. For this
     * particular implementation of the <code>FilenameFilter</code> interface,
     * the specified file is included in the file list if the file name 
     * extension (the last three or four letters after the ".") are any one
     * of the following: bmp, gif, fpx, jpeg, jpg, png, pnm, pgm, ppm, tiff
     * or tif.
     *
     * @param   dir    the directory in which the file was found.
     * @param   name   the name of the file.
     * @return  <code>true</code> if and only if the name should be
     * included in the file list; <code>false</code> otherwise.
     */


    public boolean accept(File dir, String name) {

	int index = name.indexOf(".");
	String extension = name.substring(index+1);

	if (extension.equalsIgnoreCase("bmp") || 
	    extension.equalsIgnoreCase("gif") ||
	    extension.equalsIgnoreCase("fpx") ||
	    extension.equalsIgnoreCase("jpeg") ||
	    extension.equalsIgnoreCase("jpg") ||
	    extension.equalsIgnoreCase("png") ||
	    extension.equalsIgnoreCase("pnm") ||
	    extension.equalsIgnoreCase("pgm") ||
	    extension.equalsIgnoreCase("ppm") ||
	    extension.equalsIgnoreCase("tiff") ||
	    extension.equalsIgnoreCase("tif")) {

	    return true;

	} else {

	    return false;
	}
    }
}
